For over twenty years respected astronomers reported seeing a network of straight lines on Mars which Percival Lowell said “. . . exceed in regularity any ordinary regularity of purely natural contrivance. ” NASA’s discovery of flowing water on the Martin surface reminds us that we don’t yet know everything there is to know about our neighbor.

This book reviews the rise and fall of the theory that canals existed on Mars, reviews Lowell’s thoughts on canals in Mars, and reviews Lowell’s first drawings of the Martian surface.

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